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Gemstone Encyclopedia
Dendritic Agate and Color Zoning: Distinguishin...
Discover why dendritic agate is not always true agate. Learn how color zoning and inclusions distinguish species, variety, and trade name in microcrystalline quartz.
Dendritic Agate and Color Zoning: Distinguishin...
Discover why dendritic agate is not always true agate. Learn how color zoning and inclusions distinguish species, variety, and trade name in microcrystalline quartz.
The Problem of Calling Charoite a Rock or a Min...
Understand why charoite is a mineral species but the purple gemstone is a rock. Learn about refractive index, birefringence, and the charoitite aggregate.
The Problem of Calling Charoite a Rock or a Min...
Understand why charoite is a mineral species but the purple gemstone is a rock. Learn about refractive index, birefringence, and the charoitite aggregate.
Nephrite: A Mineral Aggregate, Not a Mineral Sp...
Nephrite is a tough polycrystalline aggregate of tremolite and actinolite, not a single mineral species. Learn how this classification affects its formation, identification, and synthetic counterparts.
Nephrite: A Mineral Aggregate, Not a Mineral Sp...
Nephrite is a tough polycrystalline aggregate of tremolite and actinolite, not a single mineral species. Learn how this classification affects its formation, identification, and synthetic counterparts.
Why Does Boulder Opal Dazzle? Unveiling the Sec...
Delve into the gemology of boulder opal: its silica structure creating vivid diffraction, ironstone matrix influence, and differences from solid and matrix opal.
Why Does Boulder Opal Dazzle? Unveiling the Sec...
Delve into the gemology of boulder opal: its silica structure creating vivid diffraction, ironstone matrix influence, and differences from solid and matrix opal.
Why Kunzite Shows Different Colors in Different...
Learn why kunzite shows different colors from different angles. Discover the science of pleochroism in spodumene, its role in cutting, and how it aids identification.
Why Kunzite Shows Different Colors in Different...
Learn why kunzite shows different colors from different angles. Discover the science of pleochroism in spodumene, its role in cutting, and how it aids identification.
Color Zoning in Poudretteite: What Internal Gro...
Explore color zoning in poudretteite, a rare pink beryl-group mineral. Learn how manganese distribution creates zoning and what it reveals about natural growth.
Color Zoning in Poudretteite: What Internal Gro...
Explore color zoning in poudretteite, a rare pink beryl-group mineral. Learn how manganese distribution creates zoning and what it reveals about natural growth.